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makvit [3.9K]
3 years ago
14

The probability that Paula passes Mathematics is 2/3, and the probability that she passes English is 4/9. If the probability tha

t she passes both courses is 1/4, what is the probability that she will pass at least one course?
Mathematics
1 answer:
Anestetic [448]3 years ago
8 0

Answer:

31/36

Step-by-step explanation:

P(E or M) = P(E) + P(M) - P(E & M)

= (2/3) + (4/9) - (1/4)

= 31/36

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It’s x+8 at the bottom but if you solve this please give me a step by step so I know how to solve it, thank you!!♥️
OLga [1]

Answer:

x=4.

Step-by-step explanation:

Let's solve your equation step-by-step.

5/15=x/ x+8

Step 1: Cross-multiply.

5/15=x/ x+8

5*(x+8)=x*(15)

5x+40=15x

Step 2: Subtract 15x from both sides.

5x+40−15x=15x−15x

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Step 3: Subtract 40 from both sides.

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Step 4: Divide both sides by -10.

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One-stray Problem Solving
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Step-by-step explanation:
b) The remaining fence, after the two sides of length x are fenced, is 200-2x. That is the length of the side parallel to the building. The product of the lengths parallel and perpendicular to the building is the area of the playground:
A(x) = x(200 -2x)
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a) A(50) = 50(200 -2·50) = 50·100 = 5000 . . . . m²
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c) The equation makes no sense if either length (x or 200-2x) is negative, so a reasonable domain is (0, 100). For x=0 or x=100, the playground area is zero, so we're not concerned with those cases, either. Those endpoints could be included in the domain if you like.
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Answer:

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Step-by-step explanation:

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